Save up to a third on your hot water bill with a condensing water heater

Save up to a third on your hot water bill with a gas condensing water heater.  It works by exploiting the waste heat created when burning heating fuel to boost the water heater’s efficiency.  Separate hot water systems can potentially save a lot, gas or oil.  The typical NYC multifamily building uses 40% of its heating fuel to make hot water.  More efficient hot water generation is needed in all buildings.  

http://www.energystar.gov/index.cfm?fuseaction=find_a_product.showProductGroup&pgw_code=WHC

Tankless hot water systems only use energy while hot water is being used

Tankless hot water systems heat water instantaneously. They only use energy while hot water is being used; you don’t pay to store hundreds of gallons of hot water all day.  Look into the systems recommended by Energy Star®:  

http://www.energystar.gov/index.cfm?fuseaction=find_a_product.showProductGroup&pgw_code=WH